Automatic knockoff device for ring



Nov. 2, 1948. J. DAVIDSON 2,452,910 AUTOMATIC KNOCKOFF DEVICE FOR RING TWISTING AND SPINNING MACHINES Filed Dec. 6, 1946 2 Sheets-Sheet 1 IrlV'en for k l iyi Nov. 2, 1948. J. DAVIDSON 2,452,910 I AUTOMATIC KNOCKOFF DEVICE FOR RING TWISTING AND SPINNING MACHINES Filed Dec. 6, 1946 2 Sheets-Sheet 2 Patented Nov. 2, 19 48 UTOMATIC KNOCKOFF DEVICE FOR RING .TWISTING AND SPINNING MACHINES James Davidson, Toronto, Ontario, Canada, as

signor to Toronto Carpet Manufacturing Co.

' Limited, Toronto, ontario, Canada Appiication December 6, 19 48fSe'riai No. 714,450

1 This invention relates to improvements in the stop motion of the spool winding mechanism of ring twisting and spinning machines used in the v 14 manufacture of yarn and the principal object of 6 Claims, (Cl. 7- 18) the invention is to obviate the loss of laborand 5 yarn through being soiled by contact with'the spinner guide rings which accumulate grease and dirt.

A further object is to provide a simple and in-" plied to standard machines and which will automatically arrest the yarn feed to the bobbin and stop the rotation of the bobbin when the diameter of the yarn wound on the bobbin reaches the maximum desired so that it will not contact l6 the spinner guide ring which surrounds the bob-- bin spindle. 1

The principal feature of the invention consists in the novel arrangementof a swingable arm to contact the periphery of the yarn wound on the bobbin and connecting with said arm a member extending between the regulation feeler knockofi and a reciprocating cam, which interposed member is provided with an obstruction adapted,

expensive mechanism which may be readily ap- 1o passing through said hook tothe delivery rolls H, I and 8. I

Arranged beneath the shoe 16 of the latch II is a reciprocating cam is mounted on the wiper shaft 20, which cam operates normally without contacting the latch shoe l8.

A bracket 2| here shown mounted'on the longitudinal bar' 5 is spaced out of alignment, i..e. to one=side of the ';spind1e.and normal stepmotion mechanism..briefly described above, and rotatably mounted in said bracket 2i and a lower fixed bearing support 22, suitably mounted on the machine frame, is a vertical shaft 23.

' A block 24 is adjustably secured on,the shaft 23 at a point in 'a horizontal plane intersecting the bobbin spindle l slightly below the ring rail 26 carrying the, twister rings, whensaid rail. is

in its uppermost position.

Pivotally mounted on the block 24 to swing in a vertical plane is an arm 26 which has a rounded button 21 on one end adapted to contact the yarn wound on the bobbin at a point in a vertical plane extending through the spindle axis parallel to the main frame so that as the.

when moved between said feeler knock-oi!" and .25 diameter of the yarn on the bobbin increases the said cam, to operate the knock-off" to arrest the yarn feed and stop the spindle.

In the accompanying drawings Fig. 1 is a sectional elevational view of a portion of a stop motion ring twisting frame showing the appli- 30 cation of my invention thereto.

Fig. 2 is a front elevational view of two of the twisting spindles showing the relative arrangement of my invention therewith.

Figure 3 is a plan view of the spindle and my as improved automatic stop mechanism. a

In the stop-motion twisting frame mechanism herein shown and to which my invention is applied a row of bobbin spindles I are mounted on c a longitudinal bar 2 of the frame 1 and driven 40 by cord drives 4. J

A longitudinal bar 5 of the frame has mounted thereon opposite each spindle a bracket 6 which supports the yarn guide I which extends'over the spindle and it also forms the pivot support for the upwardly extending curved'ann 8 which supports the contacting rollers 9, Ill and II around which the yarn is carried.

An upwardly curved arm I! also supported on the bracket 6 and extending back of the arm 8 bobbins I8 5 gage the shaft 23 and limit the upward swing of the arm 26. Rigidly mounted on the upper end of the shaft 23 is'a horizontally disposed arm 30 which extends substantially parallel with the frame bar 5 but is disposed in a planejextending horizontally from the bottom of the latch shoe l6.

A thin metal strip v3| is connected to the outward swinging end of the arm 30 and it extends horizontally between the latch shoe l6 and the reciprocating cam l9 and is slidable freely therebetween and held in place by suitable guides.

Mounted on the free end of the strip 3| extending beyond the shoe and cam is a bevelled block 32 which, when the arm 30 is swung in a direction away from said shoe and cam, is drawn in between the cam and shoe so that the reciprocating movement of the cam will force-the block against the shoe and tilt the latch on its pivot to disengage the knock-off member H and simultaneously lift the detector hook II to release the tehsieh m the yam passing thereunder.

flhe z-eieesihg i e55 the member [16 hiss-sets its motion the resuieti eh step metiem mechanism e2 which it forms a pert Ethti which is net desei'ibeti in detail hereih as such mechemsm istveii known.

The stop motiexafi meehshism setuetes to wrest the spindle i through the pivetai movement eif the curved mm 8 eperetiveiy connected with the bmize t8 througi'i the rod 8-0 ref-the spindle drive.

The strip 8i seeming the block 32 will he 'eesiifi ediusted by adjusting the hiecis 26 en the iitiiti set shaftfl? se that the bieeiz 82 win some i te L eperating engagement between the latch and the cam when the diameter 0:? yam m the spindle reaches the-desired maximum and heime such vsm will eeiitaetthetwister rim; eiiti heceme ieuieti.

As the ring reii meves tip-end tiewh in winding the vest; theesm. 2G is swims" eiewmverciiv hut returns with the upward movement e2 the veil itiidflflhttttts the enter diemeterei the weuhd yam when such tiiemetet eppmaehes the mem mum, thus keeping; an accurate gauge ef the yam it is wound until it meshes the desiiee'i maxi mum when-f1 it eperetes the imeeh efi, its tie eei iheti. I

The meehemsm described is extremely simpie anti may he incorporated in the structure of a 'mzzehine er may be reeoiiiy eppiieei to existing twisting er spinning machines witheut interferinstwith the operation 0i the visual mechemis entifunctiens 0f the machine.

What I claim as my invention is:

it; a ring type yam twisting or spi mng m 7 shine, the combimtien oi the ieeiey; knock-=01? mechanism, the recipseeetihg cam and, the hate him being wound, of a member eiitehiiiiig between the aforesaid cam end ieeier knock-eh mech' enism ems]. having an ebst'ructihg member t0 transmit the movement of the cam te the imoeb eh? device, and meehs eonhecteti with said 032- structio n carrying member engaging the partin eter oi the yam vmmm en the hehhih to meve ehgegihgf adjtistehiy e the obstmtlhhetweeh eh meehemsm? he reeigsmestihg teem the hohhih. items vvimii, e m mtateieie si'ieft, eh mm meumteti en she having s e ehsi esigezeehie with theyem Wtitii'id ms the himte sets 1 the sheit sis sigitiiv seemed i;@ said shaft, e

ssiii shaft t'e reguiete the mevemeht 02 the ehstsuet ih; memhei'. ,7

5: A cieviee as eieimesi in eieim 2 in whieh yam ehgegimg arm is meitsteti te swim in e 761' ticei plane, and means eeimeeteei t0 said. to retum'it te fit herimhtai pesitieh miter heme dis placed by other pests eff the'meei'ienism.

t. A device its eieimeti in claim 2 in whieh the yam engaging arm is mounted intermediate ef its iength to swing in a vertical] plane, and counterhalahcing means is eehmectesi t0 the end vemote from the hehhimte return it ts at herizontei posi time following etispieeemeht by miles parts ef the mechanism.

REFERENKJES @K'EEID) The feiiewhigreieiehees are at meant he the iiie e22 this patent:

UNTZJLD PATENTS Nines jwfi t 3411mm) et at, M513] 17; 1892 theee m'emil the mesh 7 

